A box-type composite steel sheet pile, a vertical isolation engineering barrier and a water-stop curtain

Abstract

The invention discloses a box-type composite steel plate pile, a vertical isolation engineering barrier and a waterproof curtain. Firstly, the box-type composite steel plate piles are arranged in an inserted mode; secondly, the first inserted box-type composite steel plate pile is pulled out, and vertical isolation engineering barrier materials are pumped at the same time; thirdly, the pulled out box-type composite steel plate pile is inserted in a follow-up construction point location; fourthly, procedures of the first step to the third step are repeated until construction of one vertical face of the vertical isolation engineering barrier is completed; fifthly, according to the method from the first step of the fourth step, construction of all the vertical faces of the vertical isolation engineering barrier is completed. According to the box-type composite steel plate pile, the vertical isolation engineering barrier and the waterproof curtain, the precast box-type composite steel plate piles are utilized cyclically, so the construction cost can be greatly lowered; the thickness of the engineering barrier is small and the engineering barrier is suitable for urban industrial polluted sites and other sites with limited underground space; construction is carried out in a pumping injection mode, so the requirements of projects for adding the adhesives or increasing the bentonite mixing amount can be met; the construction method is simple and convenient to use, the degree of mechanization is high, and the construction cycle is substantially shortened.

Description

technical field [0001] The invention belongs to the technical field of underground structure engineering and environmental geotechnical engineering in geotechnical engineering, and relates to a box-type composite steel sheet pile, a vertical isolation engineering barrier and a water-stop curtain. Background technique [0002] In recent years, due to the national development strategy and the need for economic structural adjustment, a large number of industrial enterprises have been closed, relocated and transferred to factories, and the problem of site pollution caused by improper disposal of "three wastes" during their operation period has become increasingly apparent. The underground water body of the land base in the original industrial site and its surrounding areas has been heavily polluted by heavy metals and organic matter. On the other hand, in the urban solid waste landfill, the water head of the dripping liquid exceeds the standard, the bottom liner fails, and the t...

AI Technical Summary

Problems solved by technology

Bentonite itself has a strong water-swelling property, so when the content of bentonite reaches or exceeds 15%, the portion of bentonite that first meets water and hydrates will form a dense package on the unhydrated soil particles, resulting in the vertical separation of soil-bentonite The overall uneven hydration of the barrier material and the clumping phenomenon of soil blocks also cause difficulties in construction and mixing

At the same time, under the condition of high bentonite content, the mixing of backfill materials is extremely difficult, and the loss of bentonite is huge when using traditional mechanical mixing equipment (bentonite adheres to the mixing equipment)

This also makes it impossible to apply new adhesive materials that can enhance the resistance of pollutant migration and improve the corrosion resistance of soil-bentonite vertical isolation engineering barriers to actual construction projects.

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